The forms of land use and occupation without proper planning tend to generate several problems in the process of expansion of the cities, among them, mention is made of the emergence and acceleration of erosive processes, especially in places with natural vulnerability. This study aimed to characterize the urban erosions for the perception of the risks in the gullies in Açailândia-MA. The methodology used qualitative and quantitative analyzes to understand the origin of the urban erosion process (natural and / or anthropic); the evolution of these processes, by altering the natural landscape; the erosive effects resulting from natural phenomena, controlling factors and anthropic actions; the characterization of erosive features in the gully areas; and its classification as a disaster according to the Brazilian Code of Disasters - COBRADE. For the development of the methodology, two gullies were chosen, located in areas with distinct characteristics, one being located in the Barra Azul neighborhood, a transition zone from rural to urban (peri-urban) and the other in an urbanized area in the Açailândia-MA Center. According to the results found in the research it was possible to conclude that this voçoroca disaster is classified by the Brazilian Classification and Codification of Disaster - COBRADE in 1.1.4.3.3. When analyzing the origin, shape and size of the two gullies, historical data were considered for 12 years, relating the advance to each end of the rainy season. The origin of the craters is related to the interactions of the anthropic and natural factors. On the other hand, the shapes of the craters are different: the barrel of the Barra Azul neighborhood is branched and the one of the neighborhood of Centro has irregular shape, and the two gullies present their sizes classified as very large. The eroded volumes are above 40,000 m³. As a final product, a model of an Emergency or Contingency Plan for Geological Disaster Occurrences - PLANECON was prepared for the city of Açailândia (MA). The development of this allows during the crisis to develop the operationalization, the procedures and actions that should be taken, adapting them to objective planning, the hierarchy of response actions in the planning of decisions, the actual situation of the disaster during the occurrence, the use of Erosive Disaster Risk Management actions in the use of non-structural and structural measures by the responsible bodies.
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